Citrix ADC and Citrix NetScaler Gateway Multiple Vulnerabilities (CTX276688)

##
# (C) Tenable Network Security, Inc.
##

include('compat.inc');

if (description)
{
  script_id(138212);
  script_version("1.12");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/12");

  script_cve_id(
    "CVE-2019-18177",
    "CVE-2020-8187",
    "CVE-2020-8190",
    "CVE-2020-8191",
    "CVE-2020-8193",
    "CVE-2020-8194",
    "CVE-2020-8195",
    "CVE-2020-8196",
    "CVE-2020-8197",
    "CVE-2020-8198",
    "CVE-2020-8199"
  );
  script_xref(name:"IAVA", value:"2020-A-0286-S");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/05/03");
  script_xref(name:"CEA-ID", value:"CEA-2020-0129");
  script_xref(name:"CEA-ID", value:"CEA-2020-0057");

  script_name(english:"Citrix ADC and Citrix NetScaler Gateway Multiple Vulnerabilities (CTX276688)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote Citrix ADC or Citrix NetScaler Gateway device is version 10.5.x prior to 10.5-70.18, 11.1.x prior to
11.1-64.14, 12.0.x prior to 12.0-63.21, 12.1.x prior to 12.1-57.18, 12.1-FIPS prior to 12.1-55.179 or 13.0.x prior to 13.0-58.30.
It is, therefore, affected by multiple vulnerabilities:

  - An authorization bypass vulnerability exists in Citrix ADC and NetScaler Gateway devices. An
    unauthenticated remote attacker with access to the NSIP/management interface can exploit this to bypass
    authorization. (CVE-2020-8193)

  - A code injection vulnerability exists in Citrix ADC and NetScaler Gateway devices. An unauthenticated
    remote attacker with access to the NSIP/management interface can exploit this to create a malicious file
    which, if executed by a victim on the management network, could allow the attacker arbitrary code execution
    in the context of that user. (CVE-2020-8194)

  - A cross-site scripting vulnerability exists in Citrix ADC and NetScaler Gateway devices. An
    unauthenticated remote attacker can exploit this convincing a user to click a specially crafted URL, to
    execute arbitrary script code in a user's browser session. (CVE-2020-8191, CVE-2020-8198)

In addition, Citrix ADC and Citrix NetScaler Gateway are also affected by several additional vulnerabilities including
configuration-dependent privilege escalations, information disclosures, and a denial of service vulnerability.

Please refer to advisory CTX276688 for more information.");
  script_set_attribute(attribute:"see_also", value:"https://support.citrix.com/article/CTX276688");
  script_set_attribute(attribute:"solution", value:
"For versions 10.5.x, 11.1.x, 12.0.x, 12.1.x and 13.0.x, upgrade to 10.5.70.18, 11.1.64.14, 12.0.63.21, 12.1.57.18 and
13.0.58.30, or later, respectively.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-8197");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/07/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/07/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/08");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:citrix:netscaler_gateway");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:citrix:netscaler_application_delivery_controller");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("citrix_netscaler_detect.nbin");
  script_require_keys("Host/NetScaler/Detected");

  exit(0);
}
include('vcf_extras_netscaler.inc');

var app_info = vcf::citrix_netscaler::get_app_info();
var constraints;

if (app_info['fips_status'] == 1)
{
  if (preg(pattern:"^12.1.*", string:app_info['version']))
    constraints = [ {'min_version': '12.1', 'fixed_version': '12.1.55.179', 'fixed_display': '12.1-55.179 and later releases of 12.1-FIPS.'} ];
}
else
{
  constraints = [
    {'min_version': '10.5', 'fixed_version': '10.5.70.18', 'fixed_display': '10.5-70.18'},
    {'min_version': '11.1', 'fixed_version': '11.1.64.14', 'fixed_display': '11.1-64.14'},
    {'min_version': '12.0', 'fixed_version': '12.0.63.21', 'fixed_display': '12.0-63.21'},
    {'min_version': '12.1', 'fixed_version': '12.1.57.18', 'fixed_display': '12.1-57.18'},
    {'min_version': '13.0', 'fixed_version': '13.0.58.30', 'fixed_display': '13.0-58.30'}
  ];
}

vcf::citrix_netscaler::check_version_and_report(
  app_info: app_info,
  constraints: constraints,
  severity: SECURITY_WARNING
);